2003 Ford F150 Driveshaft U-joint rear Replacement

会员贡献的指南

简介

Here is a recent repair on an F-150 drive shaft. It started by making some loud clanking noise on acceleration and when slowing down. As with any repair under a vehicle, make sure that proper safety steps are followed. Use proper jack stands and wheel chock's for the front wheels. The drive shaft is not very heavy, but it's a bit cumbersome to hold. An assistant can be of great help to remove the driveshaft from under the vehicle. For the replacement of the U-joint itself, I chose to not use any special tools. I felt that it might be beneficial to show how this repair can be done with some basic tools in a drive way somewhere. Yes, the right tools might make it easier, even so I did not have any issues using what I did.

I did the replacement of the U-joint with the simplest tools I could use. The only thing to watch out for in the re-assembly, is to make sure that the needle bearings are straight in the bearing cup. Do not force the cross all the way into the cup.

工具

配件

Here is a view of the rear U-joint assembly. It is connected to the driveshaft via the flange yoke. It is bolted to the rear axle at the drive pinion flange

The front U-joint assembly connects the drive shaft and the slip yoke. The slip yoke just slides into the transmission and meshes onto the gear with it internal splines.

Use a chisel, or similar instrument, to index the flange yoke and the pinion flange. All that does, it makes a mark across those two pieces. This will assure that the drive shaft will be mounted in the same way once the repair is done.

添加评论

There are four bolts that connect the flange to the yoke. The bolt heads require a 12mm 12point socket. A 6 point socket will not fit, and a box end wrench will not generate enough torque.

Use a 12mm 12 point socket and a 16 inch breaker bar will generate enough torque to remove the bolt. Here a 1/2" drive socket set is used. 3/8" socket set may work as well, but the larger drive set will tolerate a bit more torquing.

添加评论

The driveshaft flange yoke fits tightly on the rear axle pinion flange pilot. Do not hammer on the driveshaft or any of its components to disconnect the yoke from the flange. Pry only in the area shown, to disconnect the yoke from the flange.

添加评论

Application of some lubricant may assist in loosening some of the rust and debris that may have collect between the bearing cup and the bearing hole itself. Place a piece of flat metal stock across the bearing cup.

Use a hammer and strike the flat stock

This will slide the yoke and subsequently the bearing up through the bearing opening in the driveshaft.

How in the world are you gonna balance the yoke on two pieces of wood, put a tool on top clearing the cap and hit it without it just falling off the blocks with the slightest touch and then have to spend 3 minutes balancing it back on the blocks?

This is nicely done instructions . My truck may have been a little more rusty. I put unit in heavy vice with small socket press into larger socket on opposite side to accept cap. This with PB blaster still didn’t work. I then added heat and pressure with vice and cheat bar 4’ on vice. Loud pop like a gun shot each broke free. I don’t own a press. All removed well. Now for some reason received twice wrong size joints. 2003 f350 standard cab XL Two wheel drive . Joints sent from two different suppliers wrong and too big. Mabe dealer can tell me.

添加评论

Here is a quick video to show how the damage affect the connection between the flange yoke and the driveshaft. If not replaced in time the trunion or bearing cup can shear of. This can cause major damage to the driveshaft, the pinion flange or the slip yoke. It will become a very expensive repair.

添加评论

1024

即将完成！

To reassemble your device, follow these instructions in reverse order. Ensure the needle bearings are seated straight in the bearing cup. Do not force the trunion all the way into the bearing. If it does not butt flush against it, disassemble and check for dislodged needles.

结论

To reassemble your device, follow these instructions in reverse order. Ensure the needle bearings are seated straight in the bearing cup. Do not force the trunion all the way into the bearing. If it does not butt flush against it, disassemble and check for dislodged needles.

团队

7条评论

This was by far the best write up I have seen! I was able to complete the project in under two hours and have never done them before. One thing I did learn was, on the new U-Joints you need to pay attention and ensure that you put the same cap on that you took off. Otherwise you will run into problems. Thank you again for the write up on this. Awesome Job!! And a HUGE Thank you!

Pretty good share, I'm new on this site but will probably be sharing quite a bit as I have extensive knowledge in auto repair & accessories installs as well as general construction & I've always been into tinkering with whatever interests at the time. But it a great simple repair & Casey's add about the caps is good to know before starting this project.

Troy Withrow thank you and it would be great to see you around. Guides and Answers are always appreciated and we do get a lot of automotive questions. It'll be great to have another expert like @lpfaff1 and @jimfixer when it comes to automotive questions.

Just doing this on my moms truck. Love your explanations, step by step instructions, still pictures, helped out big time. First time i've changed u joints. Had to replace whole drive shaft also. With your instructions it was a piece of cake. Thanks again.

These are the best explanations I have come across. I need to have mine replaced in the next few days. The mechanic told me it is a 2 hour hard job and would charge me $120 labor with parts supplied. Now I can do it myself just by the piping plug 11/4”!!